Family: YN
Caliber YN55A is an automatic movement manufactured by S. Epson, a Seiko subsidiary. It belongs to the YN caliber family and remains in production. The movement is considered in-house, reflecting Seiko's practice of utilizing its subsidiary for certain movement production. It appears primarily in entry-level Seiko dress watches.
Last updated 29 Apr 2026Suggest a correction
TECHNICAL SPECIFICATIONS
Movement Type
Automatic
Display Type
Analog
QUICK FACTS
BRAND
TYPE
AutomaticSTATUS
In ProductionMANUFACTURE
In-houseCALIBER FAMILY
YNALSO KNOWN AS
cal. yn55as. epson yn55a
FOR WATCH DEALERS
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